How to make every subface filled like solid volume model?

[SpongeGirl]

Hello, i want to create model like solid volume model below, every two subfaces are filled and stacked, and now i create a gempy model like this

I find an example like https://docs.pyvista.org/examples/00-load/terrain-mesh#sphx-glr-examples-00-load-terrain-mesh-py, but i don't know how to apply gempy model to do this, or you can tell me some other ways to solve my problem, cause the main code has changed a lot, some old solutions in the issues doesn't work now, so i really need your help, thanks a lot.